3 years ago

Which value of x satisfies both -9x + 4y = 8 and -3x − y = 4 given the same value of y?

1 answer:

7 0

Multiply 2nd equaton by 4 and add to first

-9x+4y=8
<u>-12x-4y=16 +</u>
-21x+0y=24

-21x=24
divide both sides by -21
x=-24/21
x=-8/7

C is answer

You might be interested in

Lyrx [107]

Answer:

c=sqrt21

Step-by-step explanation:

angle c is the angle between a and b, so use the cos law

c^2=a^2+b^2-2*a*b*cosC

c^2= 16+25-2*4*5*1/2

c^2=21

c=sqrt21

5 0

2 years ago

lisabon 2012 [21]

Answer: 1.88496

Step-by-step explanation:

8 0

3 years ago

skelet666 [1.2K]

Answer:

Raoul estimated the difference to be: 89

97.23 --> 97

8.3 --> 8

97-8= 89

The actual difference is: 88.93

97.23-8.3 = 88.93

6 0

3 years ago

slega [8]

4% because 100=100% -4 =96

4 0

2 years ago

e-lub [12.9K]

Step-by-step explanation:

omg it 41.5 have a awnsome day

4 0

2 years ago